tiny.sql.history.segment.EventRange

1pub const EventRange = struct {2    pub const Count = u64;3    pub const unit_precision_events: Count = 1;4    pub const maximum_units_per_second: Count = 512 * 1024 * 1024;5    pub const maximum_seconds_per_year: Count =6        RangeLifetime.maximum_seconds_per_year;7    pub const service_lifetime_years: Count =8        RangeLifetime.service_lifetime_years;9    pub const service_lifetime_seconds: Count =10        RangeLifetime.service_lifetime_seconds;11    pub const maximum_increment_events: Count =12        @as(Count, blocks_max) * @as(Count, std.math.maxInt(u32));13    pub const budget_events: Count = total(14        maximum_units_per_second,15        service_lifetime_seconds,16    ).?;1718    pub fn total(units_per_second: Count, lifetime_seconds: Count) ?Count {19        return totalRange(20            unit_precision_events,21            units_per_second,22            lifetime_seconds,23        );24    }2526    pub fn advance(current: Count, increment: Count) ?Count {27        if (current > budget_events or increment == 0 or28            increment > maximum_increment_events)29        {30            return null;31        }32        const next = std.math.add(Count, current, increment) catch return null;33        return if (next <= budget_events) next else null;34    }35};

1pub const EventRange = format.EventRange;